SQL : Self Join to Find Manager Employee Relationships #sql #sqlqueryinterviewquestionsandanswers

e and m Aliases:
e represents the employee.
m represents the manager.
LEFT JOIN: This is used so that employees without managers (where ManagerId is NULL) are also included in the result.
ON Clause: Matches e.ManagerId with m.EmpId, linking each employee with their manager’s details.